patients with Parkinson's disease showed that there was a signifi-
cant interaction effect on balance and agility in the Tai Chi group
[23] and also Nguyen et al., in a randomized controlled trial, studied
the effects of Tai chi exercise on balance, sleep quality and cognitive
performance in community-dwelling elderly and reported a significant
improvement in their balance score [24].
Our study showed that there was no reported significant difference
between the mean of balance scores after the intervention
in the two groups due to a lower balance mean in the intervention
group than the control group before the study. The results suggested
that Tai Chi could be an alternative exercise intervention to
increase balance in patients with MS